EP3288743B1 - Dispositif et procédé permettant de mélanger des composants de matière plastique réactifs - Google Patents

Dispositif et procédé permettant de mélanger des composants de matière plastique réactifs Download PDF

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Publication number
EP3288743B1
EP3288743B1 EP16725509.0A EP16725509A EP3288743B1 EP 3288743 B1 EP3288743 B1 EP 3288743B1 EP 16725509 A EP16725509 A EP 16725509A EP 3288743 B1 EP3288743 B1 EP 3288743B1
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Prior art keywords
storage section
feeding
free
melted
melting
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German (de)
English (en)
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EP3288743A1 (fr
Inventor
Josef Renkl
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KraussMaffei Technologies GmbH
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KraussMaffei Technologies GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/022—Melting the material to be shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7457—Mixing heads without moving stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7615—Mixers with stream-impingement mixing head characterised by arrangements for controlling, measuring or regulating, e.g. for feeding or proportioning the components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7631—Parts; Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7663—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7663—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube
    • B29B7/7673—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube having additional mixing arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7663—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube
    • B29B7/7684—Parts; Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7663—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube
    • B29B7/7684—Parts; Accessories
    • B29B7/7689—Plunger constructions
    • B29B7/7694—Plunger constructions comprising recirculation channels; ducts formed in the plunger
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/82—Heating or cooling
    • B29B7/823—Temperature control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/22—Component parts, details or accessories; Auxiliary operations
    • B29C39/24—Feeding the material into the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7471—Mixers in which the mixing takes place at the inlet of a mould, e.g. mixing chambers situated in the mould opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7615—Mixers with stream-impingement mixing head characterised by arrangements for controlling, measuring or regulating, e.g. for feeding or proportioning the components
    • B29B7/7626—Mixers with stream-impingement mixing head characterised by arrangements for controlling, measuring or regulating, e.g. for feeding or proportioning the components using measuring chambers of piston or plunger type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/82—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/885—Adding charges, i.e. additives with means for treating, e.g. milling, the charges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0002—Condition, form or state of moulded material or of the material to be shaped monomers or prepolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0058—Liquid or visquous
    • B29K2105/0067—Melt

Definitions

  • the present invention relates to a mixing assembly for mixing reactive plastic components with a melting apparatus for melting fusible plastic material according to the preamble of claim 1.
  • the invention further relates to a method for mixing reactive plastic components.
  • raw materials supplied by the raw material producers can be melted, granulated or powdered in a plasticizing screw and then injected directly into a cavity of a tool, where they cool and harden.
  • plastic components that are mixed in front of the cavity or in the cavity and react there to form a plastic part.
  • the main component for example caprolactam
  • caprolactam usually half each in two containers and give in one container a catalyst and in the other container an activator mixed.
  • a metered mixing of these premixes into a reactive melt then takes place in a common mixing head.
  • the components must be liquefied for processing to dose, inject, apply, and so on.
  • these known systems usually large containers, so-called.
  • Day container used in which the at least two basic components are melted and kept ready in the liquid state and are guided by pumps to the cavities (see Fig. 5 ).
  • the disadvantage here is that the individual components often remain very long in the large containers, whereby their quality and thus the ability to react can subside.
  • the catalyst plastic component prepares this problems and makes a short-term processing of the material necessary.
  • the melted Raw materials must therefore be processed completely within a predetermined time and the day containers must be run empty before the next amount of free-flowing material is fed and melted.
  • the melting apparatus for fusible (plastic) material contained in the mixing arrangement according to the invention comprises a container (or group of containers) in which fusible material fed into the free-flowing (granular, flaky, powdery or in a similar state) state is stored and stored in the liquid state can be.
  • the container further has a first storage section for storing the fusible material in the free-flowing state, a second storage section for storing the molten material in the liquid state and a separating section provided between the first storage section and the second storage section.
  • the separating section is configured to hold the material or the plastic component in the unfused or free-flowing state retains and in the molten or liquid state of the first storage section in the second storage section passes.
  • the mixing arrangement further comprises a mixing chamber, in which the reactive plastic components are mixable together to form a reactive mixture, a first metering and feeding device for supplying a free-flowing starting material to the at least one melting device and a second metering and / or feeding device for metered feeding at least the in the at least one melting device melted plastic component to the mixing chamber.
  • the first metering and feeding device and the second metering and feeding devices are matched to one another such that only a predetermined amount of meltable material is melted in the melting device, which corresponds to the immediate need for this plastic component, preferably to a predetermined number, in particular 2 to 10, preferably 5, is limited by downstream plastic processing operations or within a predetermined time, in particular less than or equal to 30 minutes, preferably less than or equal to 15 minutes, to be processed.
  • the plastic component in its two aggregate states i. in the free-flowing state and in the liquid state, are separated from each other or the melting of the material and the storage of the molten material in the liquid state are separated functionally.
  • the container does not have to be emptied first, but the melting of the material in the first chamber and the removal of the liquid material from the second chamber can be carried out in parallel. This allows for continuous operation that also allows for two, three or more shift operations.
  • the mixing arrangement according to the invention also allows a so-called. Stop-Go operation, since due to the structure of the melting device new material can be melted at any time without the downstream To interrupt processing processes, and thus at any time only small amounts of molten material must be present in the melting device. Thus, the melting device can be emptied at any time and very quickly and the machine can be stopped altogether. Accordingly, the booting up of the machine or the melting device takes a correspondingly short time. Due to the small amount in the second chamber, this is also processed accordingly fast, so that no additional heating energy is necessary to keep the molten material in the liquid state or "simmer".
  • the mixing arrangement according to the invention thus the disadvantages described above can be avoided.
  • the long residence times are shortened in the container, the melt quality thus held high and allows a needs-based provision of the plastic component.
  • Another advantage is that the mixing arrangement according to the invention can be realized with low investment costs.
  • the container is preferably formed in one piece and has two chambers. Alternatively, it may also be a group of containers, between which the separating section is arranged.
  • the first storage portion may be disposed vertically above the second storage portion.
  • the separation section may be a grid having a mesh size or a hole plate having a hole diameter smaller than the grain size of the material in the free-flowing state.
  • the first storage portion and / or the separating portion may be provided with a heating device and be heated to reflow the free-flowing, flowable material, preferably continuously.
  • a predetermined amount of the free-flowing material in the first storage section can be temporarily stored and melted if necessary.
  • the integration of the heating device in the separating section or the separating grid represents a device technology very simple and economically feasible solution.
  • the melting process can be carried out in particular continuously. In this case, the control of the amount of molten material substantially (with some time delay) on the supply of the material to the first storage section.
  • the grid or the perforated plate if the separating portion is formed as such, and / or can be heated, the one container portion which defines the first storage portion.
  • the entire container i. both storage sections, be heated to prevent the temperature of the molten material in the second storage section falls too low, e.g. in the event that the downstream processing operations, e.g. for tool change, must be interrupted for a short time.
  • the melting device may further comprise a first feeding and metering section for the metered, in particular continuous, feeding of the meltable material in the free-flowing state into the first storage section and / or a second supply and metering section for the metered, in particular discontinuous, removal of the melted Have material in the liquid state from the second storage section.
  • the amount of plastic components in the free-flowing or liquid state in the melting device via the two supply and metering can be adjusted, the removal of material from the melting device depending on the downstream processing method also can be discontinuous.
  • the supply and removal of the material can be controlled independently of each other.
  • a level measuring device which measures the level of the material stored in the second storage section in the liquid state. Furthermore, a control device which controls the supply of the fusible material in the free-flowing state by means of the first supply and metering section and / or the melting of the fusible material by means of the heating device in accordance with the measured fill level may be provided.
  • the control device can control the first supply and metering section and / or the heating device such that the amount of liquid material in the second storage chamber corresponds to the immediate need.
  • the amount may be adjusted to be limited to a predetermined number of downstream plastic processing operations or to be processed within a predetermined time.
  • the amount may for example be adjusted to a range between 2 to 10, in particular 4 to 8, preferably 5 plastic processing operations (shot).
  • the residence time in the second chamber can be set to a period of less than or equal to 30 minutes, in particular less than or equal to 15 minutes. This ensures that the molten material remains even without additional heating power in the liquid state (preferably with a certain viscosity).
  • the mixing arrangement may comprise a first melting device for melting a first reactive plastic component fed in the free-flowing state with a first additive, in particular caprolactam with an activator, and a second melting device for melting a second reactive plastic component fed in the free-flowing state with a second additive , in particular caprolactam with a catalyst.
  • the mixing arrangement may comprise a first melting device for melting a (eg pure) plastic component, a third metering and feeding device for metered feeding of a first additive, in particular an activator, to the mixing chamber and / or a fourth metering and feeding device for the metered feeding of a second additive, in particular a catalyst, to the mixing chamber.
  • a first melting device for melting a (eg pure) plastic component
  • a third metering and feeding device for metered feeding of a first additive, in particular an activator
  • a fourth metering and feeding device for the metered feeding of a second additive, in particular a catalyst
  • Another aspect of the invention relates to a method for mixing reactive plastic components according to the wording of claim 9.
  • Fig. 1 shows a mixing assembly 2 for mixing liquid, reactive plastic components according to a first embodiment. This serves to prepare the plastic components so that they can subsequently be used in downstream processing processes for producing plastic parts.
  • This mixing arrangement 2 has a first reservoir 4A, in which a first mixture 6A of a first plastic component, eg caprolactam, together with a first additive, eg an activator, is stored, and a second reservoir 4B, in which a second mixture 6B of the same or another plastic component, for example caprolactam, together with a second additive, for example a catalyst, is stored.
  • a first plastic component eg caprolactam
  • a first additive eg an activator
  • melter 10A and 10B are fed by a first vacuum conveyor 8A and a second vacuum conveyor 8B (or any other suitable conveyor) to a first melter 10A and a second melter 10B, respectively.
  • first vacuum conveyor 8A and a second vacuum conveyor 8B or any other suitable conveyor
  • melter 10B are identical in construction, and their structure and operation will be described in detail below.
  • the mixture 6A liquefied by means of the first melting device 10A and the mixture 6B liquefied by means of the second melting device 10B are supplied to a mixing head 14 via corresponding feed lines 12A and 12B.
  • a filter 16A, 16B and a metering unit 18A, 18B or pump are respectively provided. Excess material is returned or circulated via respective return lines 20A and 20B from the mixing head 14 to the respective melting device 10A or 10B.
  • the respective mixture 6A and 6B is injected into mixing chamber 24 via inlet nozzles 22A and 22B respectively provided in mixing head 14 and mixed together, and the resulting reactive mixture 26 is actuated by means of a piston 28 which is actuated by means of a hydraulic block 30 and controlled accordingly by a mixing head control block 32 is conveyed via an outlet opening 34 in the mixing head 14 directly or indirectly in a (not shown) mold cavity.
  • Fig. 2 shows in enlarged scale the first melting device 10A. Since both melting devices 10A, 10B are identical in construction and function, a common description is made for the melting device 10.
  • Melting device 10 is essentially formed by a container 36, which is divided by means of a separating grid 38 into a vertically upper, first chamber 40 and into a vertically lower, second chamber 42.
  • the basic component mixture 6 is conveyed via the vacuum conveyor 8 of the first (upper) Chamber 40 supplied.
  • the separation grid 38 is configured such that the supplied mixture 6, as long as it is in granular form, does not fall through the separation grid 38 down into the second chamber 42 or passes. In other words, the mesh size of the separation grid 38 is smaller or finer than the grain size of the stored in the reservoir 4 and the first chamber 40 supplied free-flowing starting mixture. 6
  • the separating grid 38 can be heated with a heating device 39, so that the mixture 6 lying on the separating grid 38 by means of the separating grid 38 in the first chamber 40 can be melted or liquefied. In liquid form, the molten mixture 6 can flow through the separating grid 38 into the second (lower) chamber 42 or drain and finally reach the feed line 12.
  • the container 36 and the two chambers 40, 42 are designed so that only immediately required amounts of free-flowing starting material or liquefied material 6 must be kept.
  • the first chamber 40 may receive preferably 10 to 20 kg of the granular mixture 6 and the second chamber 42 may receive molten material which is suitable only for a certain, small number of plastics processing operations, e.g. Max. 5 shots, or for plastic processing operations within a predetermined time period, e.g. Max. 15 minutes, enough.
  • the required plastic components can be prepared as needed or recipe appropriate. In this way, only small amounts of liquid base material components are produced, which are processed directly. Thus, a small amount can be melted, but this essentially continuously.
  • the metering and feeding device which supplies the free-flowing starting mixture 6 of the first chamber 40 of the melting device 10, and the metering and feeding device (metering unit 18), which takes the molten material 6 from the second chamber 42 of the melting device 10, are Control or regulation technically coordinated accordingly. That is, the vacuum conveyor 8A, 8B is controlled (via an integrated or central control device) so that it supplies only as much of free-flowing plastic material 6 of the first chamber 40, which corresponds to the amount of withdrawn liquid plastic material 6 from the second chamber 42.
  • the second chamber 42 acts merely as a kind of short-term buffer to compensate for any fluctuations caused by the discontinuous demand in the downstream processing operations.
  • the melting process can be continuous.
  • the Fig. 3 11 shows a functional diagram of a mixing arrangement 2 'according to a second embodiment, which differs from the first embodiment only in the construction of the mixing head 14' and the feeding of the molten material to the mixing head 14 '.
  • the feeding and metering of the molten material takes place in place of pumps 18A, 18B via metering cylinders 18A 'and 18B', which are arranged directly in front of or at the mixing head 14 ', are connected to the supply lines 12A' or 12B 'and over which the in allow the mixing chamber 24 'metered quantities precisely.
  • the return lines 20A and 20B can thus be omitted in this variant.
  • the mixing head 24 ' has a correspondingly changed structure, but is described in its operation as described above with respect to the first embodiment.
  • the Fig. 4 3 shows a functional diagram of a mixing arrangement 2 "for mixing liquid, reactive plastic components according to a third embodiment Fig. 4 is immediately apparent that in contrast to the first and second embodiments, one, two or more additives are not initially, ie before the melting process, the plastic raw material mixed, but only directly to the mixing head 14 "or the mixing chamber 24" are supplied.
  • the plastic component 7 can there in solid form or free-flowing (granular, flake -, powdered or in a similar form) or stored in liquid form.
  • the plastic component 7 is fed to the melting device 10", more precisely to a first chamber 40 "
  • the melting device 10 has a funnel-shaped container 36 ", which in turn passes over a separating grid 38". into the vertically upper first chamber 40 "and into a vertically lower second chamber 42” is divided.
  • the separation grid 38 is configured such that the supplied mixture, while in granular form or very viscous, does not fall or pass” downwardly into the second chamber 42 "through the separation grid 38.
  • the mesh size of the separation grid 38 is smaller or finer than the grain size of the in the reservoir 4 "stocked and the first chamber 40" supplied trickle-shaped plastic component 7 or holds the grid 36 "the viscous material 7 back.
  • the first chamber 40 can be heated.
  • the wall of the first chamber 40 "be provided with a heating tape 37 which can heat the wall of the first chamber 40” such that the briefly stored in the first chamber 40 "plastic component 7 is melted and liquefied. liquefied state, the plastic component 7 flows or drips through the separating grid 38 "into the second chamber 42" located underneath.
  • Via a return line 20 " an excess amount of the plastic component 7 is returned to the melting device 10", more precisely to the second chamber 42 ", or allows circulation.
  • the metering unit 18 has a metering cylinder 44 and a metering piston 46 which can be actuated via a motor 48.
  • the metering cylinder 44 may be designed to be heatable and for this purpose be provided with a, for example, integrated in the cylinder wall, heater 50. This can ensure that the liquefied plastic component 7 does not cool or whose viscosity changes.
  • About a first portion of the supply line 12 is the liquefied Plastic component 7 supplied from the second chamber 42 "of the melting device 10" the metering cylinder 44 and fed by means of the metering piston 46 via the second section of the supply line 12 "of the mixing chamber 24" under pressure.
  • One, two, three or more additives 52A, 52B, 52C are supplied from respective containers 54A, 54B, 54C in which they are stored via respective conveyor units 56A, 56B, 56C to the mixing head 14 ", more specifically the mixing chamber 24" so that they mix with the supplied liquefied plastic component 7 in the mixing chamber 24 "to a reactive mixture 26" and as such on the mixing head 24 "can be output for further processing.
  • the additives may be at least an activator and a catalyst which initiate the chemical reaction of the caprolactam in the mixing head 24 ".
  • the precise metering of the additives can take place via the respective delivery units 56A, 56B, 56C and / or via a control valve arrangement 58 provided in the mixing head 14 ".
  • Fig. 5 shows a variant of the third embodiment is shown, which differs in that the supply of the plastic component 7 by means of the metering unit 18 "done so that can be dispensed with a circulation or on the return line 20".
  • the activator or the catalyst of the plastic component 7 may already be admixed in the storage container 4 "and the other of the two additives only be supplied directly to the mixing chamber 24".

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (9)

  1. Agencement de mélange (2 ; 2' ; 2") permettant de mélanger des composants de matière plastique réactifs (6, 6A, 6B ; 6A', 6B' ; 7), comprenant :
    une chambre de mélange (24 ; 24' ; 24") dans laquelle les composants de matière plastique réactifs (6, 6A, 6B ; 6A', 6B' ; 7) peuvent être mélangés entre eux en un mélange réactif (26 ; 26' ; 26") ;
    au moins un dispositif de fusion (10, 10A, 10B ; 10A', 10B' ; 10"),
    un premier dispositif de dosage et d'alimentation (8, 8A, 8B ; 8A' ; 8B' ; 8") pour alimenter un matériau de départ (6, 6A, 6B ; 6A', 6B' ; 7) qui s'égoutte vers l'au moins un dispositif de fusion (10, 10A, 10B ; 10A', 10B' ; 10"),
    dans lequel l'au moins un dispositif de fusion (10, 10A, 10B ; 10A', 10B' ; 10") présente un récipient (36 ; 36' ; 36") dans lequel le matériau de départ (6, 6A, 6B ; 6A', 6B' ; 7) fusible alimenté à l'état d'égouttage est fondu et peut être approvisionné à l'état fluidique, et dans lequel le récipient (36 ; 36' ; 36") présente en outre un premier tronçon d'approvisionnement (40 ; 40") pour approvisionner le matériau de départ (6, 6A, 6B ; 6A', 6B' ; 7) fusible à l'état d'égouttage et un deuxième tronçon d'approvisionnement (42 ; 42") pour approvisionner le matériau de départ (6, 6A, 6B ; 7) fondu à l'état liquide ; et
    un deuxième dispositif de dosage et d'alimentation (18, 18A, 18B ; 18A' ; 18B' ; 18") pour l'alimentation dosée des composants de matière plastique réactifs (6, 6A, 6B ; 6A', 6B' ; 7) fondus dans l'au moins un dispositif de fusion (10, 10A, 10B ; 10A', 10B' ; 10") vers la chambre de mélange (24 ; 24' ; 24"), caractérisé en ce que
    le récipient (36 ; 36' ; 36") présente en outre un tronçon de séparation (38 ; 38"), lequel tronçon de séparation (38 ; 38") est prévu entre le premier tronçon d'approvisionnement (40 ; 40") et le deuxième tronçon d'approvisionnement (42 ; 42") et est ainsi conçu qu'il retient le matériau (6, 6A, 6B ; 6A', 6B' ; 7) à l'état non fondu ou qui s'égoutte et le laisse passer à l'état fondu ou fluidique du premier tronçon d'approvisionnement (40 ; 40") au deuxième tronçon d'approvisionnement (42 ; 42"), dans lequel
    le premier dispositif de dosage et d'alimentation (8, 8A, 8B ; 8A' ; 8B' ; 8") et le deuxième dispositif de dosage et d'alimentation (18, 18A, 18B ; 18A' ; 18B' ; 18") sont ainsi coordonnés entre eux que dans l'au moins un dispositif de fusion (10, 10A, 10B ; 10A', 10B' ; 10"), seule une quantité prédéterminée de matériau de départ (6, 6A, 6B ; 6A', 6B' ; 7) fusible est fondue, laquelle correspond au besoin immédiat de ces composants de matière plastique réactifs (6, 6A, 6B ; 6A', 6B' ; 7).
  2. Agencement de mélange (2 ; 2' ; 2") selon la revendication 1, caractérisé en ce que le premier tronçon d'approvisionnement (40 ; 40") est disposé verticalement au-dessus du deuxième tronçon d'approvisionnement (42 ; 42") ; et
    le tronçon de séparation (38 ; 38") est une grille avec une grosseur de maille ou une plaque trouée avec un diamètre de trou inférieur à la grosseur de grain du matériau (6, 6A, 6B ; 6A', 6B' ; 7) à l'état d'égouttage.
  3. Agencement de mélange (2 ; 2' ; 2") selon la revendication 1 ou 2, caractérisé en ce que le premier tronçon d'approvisionnement (40 ; 40") et/ou le tronçon de séparation (38 ; 38") peu(ven)t être chauffé(s) par un dispositif de chauffage (37 ; 39) pour fondre, de préférence en continu, le matériau (6, 6A, 6B ; 6A', 6B' ; 7) fusible qui s'égoutte.
  4. Agencement de mélange (2 ; 2' ; 2") selon l'une des revendications 1 à 3, caractérisé en ce que le premier dispositif de dosage et d'alimentation (8, 8A, 8B ; 8A' ; 8B' ; 8") est conçu pour l'alimentation dosée, en particulier continue, du matériau (6, 6A, 6B ; 6A', 6B' ; 7) fusible à l'état d'égouttage dans le premier premier tronçon d'approvisionnement (40 ; 40") et/ou le deuxième dispositif de dosage et d'alimentation (18, 18A, 18B ; 18A' ; 18B' ; 18") est conçu pour l'évacuation dosée, en particulier discontinue, du matériau (6, 6A, 6B ; 6A', 6B' ; 7) fondu à l'état fluidique hors du deuxième tronçon d'approvisionnement (42 ; 42").
  5. Agencement de mélange (2 ; 2' ; 2") selon la revendication 3 ou 4, caractérisé en outre par :
    un dispositif de mesure de niveau qui mesure le niveau du matériau (6, 6A, 6B ; 6A', 6B' ; 7) approvisionné à l'état fluidique dans le deuxième tronçon d'approvisionnement (42 ; 42") ;
    un dispositif de commande qui commande l'alimentation du matériau (6, 6A, 6B ; 6A', 6B' ; 7) fusible à l'état d'égouttage au moyen du premier dispositif de dosage et d'alimentation (8, 8A, 8B ; 8A' ; 8B' ; 8") et/ou la fusion du matériau (6, 6A, 6B ; 6A', 6B' ; 7) fusible au moyen du dispositif de chauffage (37 ; 39) selon le niveau mesuré.
  6. Agencement de mélange (2 ; 2") selon la revendication 5, caractérisé en ce que le dispositif de commande commande le premier dispositif de dosage et d'alimentation (8, 8A, 8B ; 8A' ; 8B' ; 8") et/ou le dispositif de chauffage (37 ; 39) de telle façon que la quantité de matériau (6, 6A, 6B ; 7) fluidique dans le deuxième tronçon d'approvisionnement (42) correspond au besoin immédiat.
  7. Agencement de mélange (2 ; 2') selon l'une des revendications 1 à 6, comprenant :
    un premier dispositif de fusion (10A ; 10A') pour faire fondre un premier composant de matière plastique réactif (6A ; 6A') alimenté à l'état d'égouttage avec un premier additif, en particulier du caprolactam avec un activateur,
    un deuxième dispositif de fusion (10B ; 10B') pour faire fondre un deuxième composant de matière plastique réactif (6B ; 6B') alimenté à l'état d'égouttage avec un deuxième additif, en particulier du caprolactam avec un catalyseur.
  8. Agencement de mélange (2") selon l'une des revendications 1 à 7, comprenant :
    un troisième dispositif de dosage et d'alimentation (56A, 58) pour l'alimentation dosée d'un premier additif (52A), en particulier d'un activateur, vers la chambre de mélange (24") ;
    un quatrième dispositif de dosage et d'alimentation (56B, 58) pour l'alimentation dosée d'un deuxième additif (52B), en particulier d'un catalyseur, vers la chambre de mélange (24) ; dans lequel
    l'alimentation du composant de matière plastique (7) et des additifs (52A, 52B) au moyen des deuxième, troisième et quatrième dispositifs de dosage et d'alimentation (18", 56A, 56B) est coordonnée entre eux dans le temps et en quantité de telle façon que ceux-ci et le cas échéant d'autres composants se mélangent entre eux en le mélange réactif (26") souhaité dans la chambre de mélange (24").
  9. Procédé permettant de mélanger des composants de matière plastique réactifs (6A, 6B ; 6A', 6B'), comprenant les étapes :
    d'alimentation dosée des composants de matière plastique réactifs (6A, 6B ; 6A', 6B') à l'état d'égouttage respectivement vers un dispositif de fusion (10A, 10B ; 10A', 10B') correspondant, dans lequel l'au moins un dispositif de fusion (10, 10A, 10B ; 10A', 10B' ; 10") présente un récipient (36 ; 36' ; 36") dans lequel le matériau de départ (6, 6A, 6B ; 6A', 6B' ; 7) fusible alimenté à l'état d'égouttage est fondu et peut être approvisionné à l'état fluidique, et dans lequel le récipient (36 ; 36' ; 36") présente en outre un premier tronçon d'approvisionnement (40 ; 40") pour approvisionner le matériau de départ (6, 6A, 6B ; 6A', 6B' ; 7) fusible à l'état d'égouttage et un deuxième tronçon d'approvisionnement (42 ; 42") pour approvisionner le matériau de départ (6, 6A, 6B ; 6A', 6B' ; 7) fondu à l'état liquide ;
    de fusion des composants de matière plastique réactifs (6A, 6B ; 6A', 6B') dans le dispositif de fusion (10, 10A, 10B ; 10A', 10B') respectif ;
    d'alimentation dosée du composant de matière plastique réactif (6A, 6B ; 6A', 6B') fondu respectif vers une chambre de mélange (24 ; 24'), et
    de mélange des composants de matière plastique réactifs (6A, 6B ; 6A', 6B') fondus entre eux en un mélange réactif dans la chambre de mélange (24 ; 24') ;
    caractérisé par :
    une coordination des deux étapes d'alimentation entre elles de façon à ce que dans le dispositif de fusion (10A, 10B ; 10A', 10B') respectif, seule une quantité prédéterminée de composant de matière plastique réactif (6A, 6B ; 6A', 6B') fusible est fondue, laquelle correspond au besoin immédiat en ce composant de matière plastique (6A, 6B ; 6A', 6B'), dans lequel le récipient (36 ; 36' ; 36") présente en outre un tronçon de séparation (38 ; 38"), lequel tronçon de séparation (38 ; 38") est prévu entre le premier tronçon d'approvisionnement (40 ; 40") et le deuxième tronçon d'approvisionnement (42 ; 42") et retient le matériau (6, 6A, 6B ; 6A', 6B' ; 7) à l'état non fondu ou qui s'égoutte et le laisse passer à l'état fondu ou fluidique du premier tronçon d'approvisionnement (40 ; 40") au deuxième tronçon d'approvisionnement (42 ; 42").
EP16725509.0A 2015-06-18 2016-05-25 Dispositif et procédé permettant de mélanger des composants de matière plastique réactifs Active EP3288743B1 (fr)

Applications Claiming Priority (2)

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DE102015109770.2A DE102015109770A1 (de) 2015-06-18 2015-06-18 Schmelzvorrichtung zum Schmelzen von schmelzbarem Kunststoffmaterial
PCT/EP2016/061767 WO2016202541A1 (fr) 2015-06-18 2016-05-25 Dispositif de fusion et procédé permettant de fondre une matière plastique fusible, procédé permettant de mélanger des composants de matière plastique réactifs

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KR (1) KR20180018577A (fr)
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US10723092B2 (en) * 2016-07-18 2020-07-28 Ppg Industries Ohio, Inc. Method and apparatus for manufacturing an optical article
AT520183B1 (de) 2017-12-22 2019-02-15 Engel Austria Gmbh Injektionssystem
DE102018121890B4 (de) * 2018-09-07 2021-08-05 Kraussmaffei Technologies Gmbh Vorrichtung und Verfahren zum Herstellen von Reaktionskunststoffen
CN111037771A (zh) * 2019-11-21 2020-04-21 河北领启机械设备销售有限公司 一种用于聚氨酯和铝合金型材浇注复合装置

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CN107635735A (zh) 2018-01-26
EP3288743A1 (fr) 2018-03-07
US20190358857A1 (en) 2019-11-28
WO2016202541A1 (fr) 2016-12-22
KR20180018577A (ko) 2018-02-21
CN107635735B (zh) 2020-12-22
ES2740174T3 (es) 2020-02-05
DE102015109770A1 (de) 2016-12-22
US20180169899A1 (en) 2018-06-21
DE202015009025U1 (de) 2016-07-11
US11104039B2 (en) 2021-08-31

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